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ADW_STERAD

November 13, 2014
 ALIASES:

Trojan.Win32.Generic!BT (Sunbelt)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

4,044,984 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

13 Nov 2014

Arrival Details

This adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This adware creates the following folders:

  • %User Temp%\nsi3.tmp
  • %User Profile%\Application Data\Websteroids
  • %User Profile%\Websteroids\Chrome
  • %User Profile%\Websteroids\Firefox
  • %User Profile%\Firefox\chrome
  • %User Profile%\chrome\content
  • %User Profile%\Websteroids\IE

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Other System Modifications

This adware deletes the following files:

  • %User Temp%\nsc1.tmp
  • %User Temp%\nsi3.tmp

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}

HKEY_CURRENT_USER\SOFTWARE\DynConIE

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
id = "dd393cfd9249495091314094b33347cd"

HKEY_CURRENT_USER\Software\DynConIE
id = "dd393cfd9249495091314094b33347cd"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
vp = "2.6.5367089"

HKEY_CURRENT_USER\Software\DynConIE
vp = "2.6.5367089"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
p = "67089"

HKEY_CURRENT_USER\Software\DynConIE
p = "67089"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
ad = "websteroidsapp.com"

HKEY_CURRENT_USER\Software\DynConIE
ad = "websteroidsapp.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
ns = "WBST"

HKEY_CURRENT_USER\Software\DynConIE
ns = "WBST"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
v = "2.6.53"

HKEY_CURRENT_USER\Software\DynConIE
v = "2.6.53"

Dropping Routine

This adware drops the following files:

  • %User Temp%\nsi3.tmp\System.dll
  • %User Temp%\nsi3.tmp\Helper.dll
  • %User Temp%\nsi3.tmp\version.dll
  • %User Temp%\nsi3.tmp\modern-wizard.bmp
  • %User Temp%\nsi3.tmp\nsDialogs.dll
  • %User Temp%\nsi3.tmp\Processes.dll
  • %User Profile%\Websteroids\Websteroids.ico
  • %User Profile%\Chrome\common.crx
  • %User Profile%\Firefox\chrome.manifest
  • %User Profile%\Firefox\install.rdf
  • %User Profile%\content\main.js
  • %User Profile%\content\overlay.xul
  • %User Profile%\IE\common.dll
  • %User Profile%\Websteroids\Uninstall.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.700

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {E5A7A645-8318-4895-B85C-EDC606B80DB6}
  • In HKEY_CURRENT_USER\SOFTWARE
    • DynConIE

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
    • id = "dd393cfd9249495091314094b33347cd"
  • In HKEY_CURRENT_USER\Software\DynConIE
    • id = "dd393cfd9249495091314094b33347cd"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
    • vp = "2.6.5367089"
  • In HKEY_CURRENT_USER\Software\DynConIE
    • vp = "2.6.5367089"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
    • p = "67089"
  • In HKEY_CURRENT_USER\Software\DynConIE
    • p = "67089"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
    • ad = "websteroidsapp.com"
  • In HKEY_CURRENT_USER\Software\DynConIE
    • ad = "websteroidsapp.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
    • ns = "WBST"
  • In HKEY_CURRENT_USER\Software\DynConIE
    • ns = "WBST"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E5A7A645-8318-4895-B85C-EDC606B80DB6}
    • v = "2.6.53"
  • In HKEY_CURRENT_USER\Software\DynConIE
    • v = "2.6.53"

Step 4

Search and delete these components

[ Learn More ]
There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Temp%\nsi3.tmp\System.dll
  • %User Temp%\nsi3.tmp\Helper.dll
  • %User Temp%\nsi3.tmp\version.dll
  • %User Temp%\nsi3.tmp\modern-wizard.bmp
  • %User Temp%\nsi3.tmp\nsDialogs.dll
  • %User Temp%\nsi3.tmp\Processes.dll
  • %User Profile%\Websteroids\Websteroids.ico
  • %User Profile%\Chrome\common.crx
  • %User Profile%\Firefox\chrome.manifest
  • %User Profile%\Firefox\install.rdf
  • %User Profile%\content\main.js
  • %User Profile%\content\overlay.xul
  • %User Profile%\IE\common.dll
  • %User Profile%\Websteroids\Uninstall.exe

Step 5

Scan your computer with your Trend Micro product to delete files detected as ADW_STERAD. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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